Revolving-screen construction.



w. e. CHAPMAN. A REVOL'VING SCREEN CONSTRUCTION.

APPLICATION-FILED lULY 3. 1915.

1,201,147.v Patented oct. 10,1916.

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WILBERT Gr. CHAPMAN, OF lLOS ANGELES, CALIFORNIA.

REVOLVING-SCREEN CONSTRUCTION.

Specification of Letters Patent.

Patented oet. 1o, 191e.

Appli-cation led July 3, 1915. Serial No. 37,949.

T0 /LZZ whom t may concern.'

Be it known that I, WILBERT G. CHAP- MAN, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Revolving- Screen Constructions, of which the following is a specification.

This inventionrelates to a ro-tary screen, and especially to a screen for sand, although it is adapted for screening crushed lime, stones, cement, rock, gypsum and numerous other materials.

It is an object of this invention to provide a revolving screen construction with panels provided with screens, the panels being detachably secured in place, permitting easy and quick removal and replacement of any of the panels when desired.

It is a further object of this invention toprovide a revolving screen construction with jarring hammers for the purpose of dislodging any material which may clog the meshes of the screens.

I accomplish these objects by means of the embodiment of my invention illustrated in the accompanying drawing, in which:

Figure 1 is a perspective view of my revolving screen construction. Fig. 2 is an enlarged vertical section taken on the line 2h`2 of Fig. 1. front elevation of the rotary member. Fig. 4 is an end elevation of the rotary member. Fig. 5 is a detail illustrating the means for locking the screen panels in place. Fig. 6 is a detail of the hammer construction.

More specifically, 6 indicates a housing which is provided with a hinged cover 7 to permit ready access to the rotary element. A chute 8 is provided for feeding the material to be screened to the rotary element. Chutes 9, 10 and 11 are provided for withdrawal of the screened material. Pillowvblocks 12 and 13 are disposed at the endsv of the frame and support an inclined shaft 14 Which passes through the housing and has secured to its outer end a driving pulley 15.

My invention resides particularly in the rotary element. Spiders 16 and 17 are mounted upon shaft 14 and support a frame which is provided with members 18 disposed parallel to the shaft 14. The members 18 are preferably formed of wood. The sides converge toward the shaft 14 and have Fig. 3 is a fragmentary.

mounted upon them channel members 19 preferably of iron adapted to receive the panel screens. The panel screens are comprised of rectangular frames 20 havin-g a wire screen 21 mounted thereon. The structure is such that apanel lits between oppositely disposed channel irons and may be slid into place. To lock the panels in position I have provided bars 22 which are pivotally mounted at their center' upon the ends of members 18 and are of such length that when turned so that their longitudinal axis is normal to the shaft 14, the ends overhang the panels and prevent them from moving outward.

The operation of the locking members 22 is clearly shown in Fig. 4 wherein the locking member 22 is shown in position securing the panels to the frame. Spaced from the panels 20 is a second frame. Bolts or Arods 28 with spacing collars 24 provide the means of attachment of the outer frame to the inner frame. The outer frame is similar in construction to the inner frame, and comprises members 25 disposed parallel to shaft 14 and provided with channels 26 for receiving the panels 27. Panels 27 are of such dimensions that the ends of the passageway formed by the outer screen structure is spaced longitudinally from the end of the passageway formed by the inner screen structure.

Mounted upon the outer screen structure preferably near the center thereof are gravity operated hammers 28 which are pivotally secured at one end to the outer panels, as indicated at 29 and are provided with a shoulder 30 for limiting their movement. Anvils 31 are provided on the panels against which the hammers strike. These hammers are for the purpose of jarring the screen structure and preventing clogging of the meshes of the screen as Well as assisting in jarring the material which is being passed through the screen.

In the operation of myl improved screen the outer panels are preferably of a less mesh than the innerpanels. The material to be screened is fed through the chute 8 and into the open end 32 Vof the rotary 'element. The rotary element being inclined, the material gradually passes to the lower open end. During its passage the agitation of the material causes that of sufficient lineness to pass through the mesh of the inner screen, and that which is too coarse gradually passes outward and drops into the chute 9. The material Which passes through the screen 21 falls upon the screen in the panels 27 which is of a finer mesh, and that which is of suiiicient ineness Works through the screens and falls into the Chute l1. That which is too coarse passes through the mesh of the screens in panels 27, Works its Way downward and into the chute 10.

The specific embodiment of my invention shown herein grades the `material into parts of three different qualities of fineness.

WILBERT G. CHAPMAN.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents.

Washington, D. C. 

